Ruffalo explains 'snowballed' terror list reports

The Zodiac star was said to have been added to a terror alert watchlist after hosting screenings for GasLand, a documentary about natural gas drilling, in September (10).

But the actor has shrugged off the reports, insisting he hasn't encountered any problems while travelling.

He tells the Wall Street Journal, "I've never been stopped at the airport and I think that the story has snowballed into this incredibly fantastical thing.

"At the centre, of course, is one small grain of truth, which is that back in September, I was hosting educational screenings of GasLand. Pennsylvania's Homeland Security was monitoring these screenings and feeding information to the gas industry."